Hybrids?

I have a vampire-mermaid children, they where born like townies, brown skin brown eyes and random face shape, etc, ive modify them to make the look like their parents, my older son is a teenager so he can turn into his dark form and when swimming he has a mermaid tail, he can do dark meditation, drink plasma and has his mom hability of emotional incluence, i cant access to his vampire powers nor to the tail modification in CAS, my daughter still a child but so far this is what ive seen of my hybrid children, o yeah, they growl like vampires too and the supernatural needs icon is a fish, he has the vampiric energy bar and thirst bar too, as he where just a vampire and hidratation bar too, am i the only one with this cool problem/bug? Btw i have my game in spanish im gonna post an image if i can.